How to Date the Rig Veda?

The question of dating the Rig Veda is one of those that has most divided researchers, and continues to do so. Not because evidence is lacking, but because certain answers disturb solidly entrenched academic certainties, while others clash with nationalist sensitivities on both sides, Indian and Western. What can be said, by reading the text carefully and cross-referencing the data that archaeology, astronomy, hydrology and linguistics have accumulated over recent decades, is that the Rig Veda is considerably older than nineteenth-century Western Indology was willing to believe, and that its dates can be established with reasonable precision from convergent evidence that the text itself provides.

The first point to understand is that the Rig Veda is not a homogeneous text written at a single period by a coherent group of authors. It is a compilation, or rather a series of successive compilations, assembled over approximately two millennia. The mandalas do not all belong to the same era, and the study of vocabulary, metre and the names of the rishis allows them to be classified chronologically with reasonable reliability. The oldest are the so-called family mandalas, mandalas two through seven, with this internal chronology: six, three, seven, four, two, five, plus the first part of the first mandala. Mandalas eight, nine and the remaining parts of the first mandala form an intermediate layer. The tenth mandala is the most recent, added after the disappearance of soma, probably between 2200 and 1900 BCE.

The astronomical evidence is the most spectacular and the most precise. In the fifth mandala, one of the oldest, a hymn describes a solar eclipse in sufficient detail for astronomers to calculate it retrospectively. This eclipse took place in 3929 or 3928 BCE. This is not a vague approximation. It is a date. It places the composition of the oldest hymns of the Rig Veda at around 4000 BCE, which is considerably older than the 1500 BCE that nineteenth-century Western Indology had fixed as the date of composition, on the basis of arguments that owed more to cultural prejudice than to scientific method.

The hydrological evidence is equally solid. The river Sarasvati, today called the Ghaggar in India and the Hakra in Pakistan, is mentioned in the Rig Veda as a powerful, abundant river, almost divine in its greatness. It is indeed deified, becoming the goddess Sarasvati of whom we have spoken elsewhere. Hydrological analyses and satellite surveys carried out over recent decades have made it possible to date the progressive drying up of this river. It ceased to flow significantly around 1900 BCE, under the combined effect of tectonic changes and a prolonged drought. In the most recent hymns of the Rig Veda, one begins to sense an unease, an awareness that something is running dry. But in the ancient hymns, it flows with an abundance that leaves no doubt: these texts were composed when the river was still alive and powerful, that is to say before 1900 BCE. The lower boundary is therefore clear.

The drought that caused the drying up of the Sarasvati forms part of a well-documented global climatic episode that struck the entire intertropical zone of the planet between 2200 and 2100 BCE. It is this same episode that also provoked the collapse of the Akkadian Empire in Mesopotamia and brought the Egyptian Old Kingdom to an end. In the Rig Veda, this episode is readable in the tenth mandala through the growing scarcity of soma: the plant, which requires precise conditions of humidity to grow, disappeared progressively with the drought. Certain hymns of the tenth mandala mention explicitly that soma is becoming scarce and that some participants in the sacrifice no longer have access to it. This is a chronological marker of remarkable precision: the moment when soma disappears corresponds to a dated climatic event, and the tenth mandala therefore falls around 2200 to 1900 BCE.

Linguistics provides a third body of evidence. The Sanskrit of the Rig Veda, and in particular that of the oldest mandalas, is of extraordinary archaism. It is closer to reconstructed Proto-Indo-European than Classical Latin is to Proto-Italic. Comparisons with the Avesta, the sacred text of Iranian Zoroastrianism, show that the two traditions shared a common language and a common spirituality at a very ancient period, probably around 4000 BCE, before the two branches separated geographically and culturally. The fact that both texts venerate the same gods under slightly different names, that they use the same sacred drink under two different names derived from the same word, and that they share almost identical ritual structures, is an independent confirmation of the common antiquity of the two traditions.

The archaeology of the Indus-Sarasvati civilisation provides the material framework within which all of this makes sense. This civilisation, whose great cities such as Harappa, Mohenjo-daro and Rakhi Garhi represent its mature urban phase, developed precisely in the geographical zone described by the Rig Veda, between the Ganges and the Indus, between approximately 3500 and 1900 BCE for its classical period. The seals found at Mohenjo-daro depict figures in yogic meditation postures, which confirms that the spiritual practices described in the Rig Veda were indeed contemporary with this civilisation. The progressive disappearance of this urban civilisation coincides exactly with the drying up of the Sarasvati and the end of the Rig Veda as a living text.

What all of this yields, once synthesised, is a coherent and solidly supported chronology. The earliest hymns, those of mandalas two through six, were composed between 4000 and 3500 BCE, in a context of semi-nomadic life and small rural communities. The first great compilation, which brought together these ancient hymns, was probably made after the war of the ten kings, somewhere between 4000 and 3500 BCE. The intermediate mandalas correspond to the period of full urban development of the Indus-Sarasvati civilisation, between approximately 3500 and 2200 BCE. And the tenth mandala, the most recent and the most heterogeneous, was composed and added to the final compilation between 2200 and 1900 BCE, during and after the great drought that brought this civilisation to an end.

What is remarkable in all of this is the coherence of the evidence. Astronomy, hydrology, climatology, linguistics and archaeology converge toward the same dates, independently of one another. This is not the case of a fragile theory resting on a single type of proof. It is the convergence of several disciplines pointing in the same direction. The Rig Veda is the oldest religious text in the world whose composition can be dated with this degree of precision. It predates the writing of the Torah, the construction of the first pyramids, and most of the monuments we regard as the oldest milestones of human civilisation. Understanding this changes the way we look at it, and at ourselves.